代码说明： LiveGUID is a class that implements decomposing / assembling of TGUID's 16-byte structure to/from four tokens, which can then be manipulated as simple cardinal integers or strings. By taking advantage of GUID uniqueness, LiveGUID's tokens can be useful to create unique integer or string id's such as indexes for database tables or session id's. The NIC (Network Interface Card) MAC address can also be determined with LiveGUID.

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